1878.| 



Conductive Properties of Ice. 



187 



III. Fresh-water Ice. Flame 6 inches from nearest Thermometer. 

 Temperature of outer air = — 43°. January 7, 1876. 



Time. 



Ther. 1. 



Ther. 2. 



Ther. 3. 



Ther. 4. 



-L CULL LJCl <X 



ture in 

 house. 



Ther. 

 Y.Y. 



Remarks. 



hrs. min. 



9 46 

 10 1 

 10 16 

 10 31 

 10 46 



Range. . 



o 



-23 

 -22 -25 

 -21 

 -20 1 

 -19 75 







-24 

 -24 

 -23 5 

 -23 25 

 -23 



o 



-21 



-20-75 

 -20-5 

 -20-5 

 -20 -25 







-20 



-20 



-19-90 



-20 



-20 



o 



-21 



-20-75 



-20-5 



-20-75 



-20-5 







-23 

 -22 

 -22 

 -22 

 -22 -75 



Screen used 

 to prevent 

 radiation. 



3-25 1-0 



0-75 



0-0 | 0-5 



1 



0-25 



Curve of relative Conductivities. 



Fresh-water Ice. II. 



„ V. 



Sea-water Ice. VI. 



VII. 



IV. Fresh-water Ice. Flame 6 inches from nearest Thermometer, 

 Temperature of outer air = — 34°. January 11, 1876. 



Time. 



Ther. 1. 



Ther. 2. 



Ther. 3. 



Ther. 4. 



Temperature 

 of house. 



hours minutes 

 12 13 

 12 28 

 12 43 

 12 58 

 1 13 



-19°-25 



-18-25 



-17 



-16 



-15 



o 



-16 

 -17 75 

 -15-1 

 -14-75 

 - 14 -75 



-16° 



-15-25 



-15 



-15 



-15 



-18° 5 

 -18 

 -17 -5 

 -17-5 

 -17-25 



-17° 

 -16 

 -15 '75 

 -15-25 

 -15 



4 25 



1 -25 | 1 -00 



1 25 



2 





VOL. XXYII. 



